Textile spindle slide mounting



Feb. 21; 1950 J. K. COCHRAN TEXTILE SPINDLE sung: uoum'mc Filed July 23, 1948 XNVENTOR JOHN K. COCHRAN ATTO R N EY- Patented Feb. 21, 1950 TEXTILE SPINDLE SLIDE MOUNTING John K. Cochran, Conyngham, Pa., assignor, by mesne assignments, to The Marquette Metal Products Company, Cleveland, Ohio, a corporation of Ohio Application July 23, 1948, Serial No. 40,202

3 Claims. 1

This invention relates to a slidable mounting for a rotatable spindle for spinning and twisting textile yarns.

In spinning and twisting textile yarns a bobbin or package of the yarn may be supported by a rotatable spindle which in turn is mounted on a suitable support. The spindle rotates, being I driven by a belt, while the package of yarn may rotate with the spindle or may remain comparatively stationary. In one type of spindle mounting the spindle is mounted on a sliding portion so that the whorl of-the spindle may be moved toward or away from the driving belt. One such type mechanism is shown and certain features thereof claimed in copending application Serial No. 1974, filed Jan. 13, 1948.

It has been found that during operation of this type mechanism there was excessive corrosion of the surfaces of the fixed lateral support or of the surface of the moving or sliding member supporting the spindle. The corrosion resulting on these bearing surfaces was great enough to cause considerable concern in the industry. The products of corrosion tended to fill the clearance between the two parts causing the sliding part to stick. The excessive repair and removal or cleanmg of the corroded parts made this type of apparatus impractical from the commercial point of View.

Therefore, it is the principal object of this invention to provide a suitable sliding surface for a spindle mounting which will prevent excessive corrosion and reduce it to a minimum so as to make practical this type apparatus for commercial use.

Other objects will be apparent after a study of the following description, claims and drawings in which- Figure 1 is a side elevational view of a spindle slide mounting of the type referred to Figure 2 is a plan view of the apparatus of Figure 1 showing a portion of the bearing surface of the lateral supporting member;

Figure 3 is a plan view of the lateral support member itself with the spindle and its sliding member removed so as to illustrate the surface of this fixed member; and

Figure 4 is a, cross-sectional view through 4-4 of Figure 3.

Referring now in more detail to Figure 1, there is shown a bracket II which may be attached by any suitable means to a supporting frame. A lateral supporting portion I2 is attached to the bracket II. The lateral portion I2 provides the which the spindle I4 is mounted. The sliding support I3 as well as the lateral fixed support I2 have a center opening for the bolster. I5 of the spindle I4. Suitable supporting washers I6 form a resilient cushion for the spindle I 4. A coil spring I! permits the entire spindle It to be resiliently mounted on its sliding support member I 3. The spindle I4 is driven by means of a driving belt I8 contacting the whorl portion I9 of the spindle.

The spindle I4 may be moved toward or away from the driving belt I8 on its slide support I3. The spindle is maintained in rotating position by means of a coil spring 2 I. A latch mechanism 22 provides a suitable handle by means of which the spindle may be moved to a non-rotating position away from the driving belt I8. The opening 23 in lateral support member I2, shown more clearly in Figure 3, is elongated to permit longitudinal movement of the bolster I5.

It will be apparent that this construction involves considerable relative sliding frictional contact between the surfaces of the fixed lateral support I2 and the sliding support I3. In normal operation the spindle is moved toward and away from the driving belt a number of times for various reasons such as loading and unloading spools of yarn, repairing broken strands, etc. Also because of the resilient support of the rotating spindle provided by the springs I1 and 2| there is a continual slight amount of agitation or oscillation causing relative movement between the bearing surfaces of the support members I2 and I3. These sliding and relative movements caused the corrosion as described above, in spite of the fact that the surfaces were well lubricated.

To overcome this corrosion, the surface of the fixed lateral support member I! may be treated by stamping or coining or other similar operation to provide a plurality of grooved depressions 24 throughout the entire lateral area over which the slide support I3 passes and extending beyond one margin of the mutually contacting surfaces so that at least during normal operation the depressions cannot be closed. In the particular preferred form illustrated, these grooves or depressions are provided in a cross hatched continuous design as shown in Figure 3 forming uniformly small lands relative to the total slidably contacting area, the defining grooves of which cannot become closed pockets. Each of the lines of the cross hatch design of Figure 3 represents a small groove in the surface of the member I2 so that there results a plurality of relatively supporting surface for a sliding member I3 on I! raised portions providing the bearing surface for 3 the slide support It on fixed lateral support l2. The nature of the bearing surface will depend on the type of operation performed on the surface of the support II.

The depth of the grooves is not critical. However, they should be suiilciently deep so that an oil film will form to cover the cross hatch surface leaving a depression in the oil film whereever there is a groove or depression in the bearing surface. Since these depressions are contlnuous from one end of the sliding surface to the other, an air path is provided.

' As mentioned previously, the grooves 24 in the surface I: may be produced by stamping or coining or other suitable well known operation. On experimental models satisfactory results were obtained by filing the surface.

It will be apparent that while the particular design of the grooved surface is not critical it is preferred that multiple depression paths be provided longitudinally from one end of the sliding surface to the other. Thus, while a cross hatch design is preferred and has been found to be completely satisfactory, it will be apparent that a plurality of longitudinal grooves will also help to accomplish the same result.

Similarly, while the surface of the fixed lateral support I! has been treated and found to be satisfactory in operation and thus is the preferred form, it will be apparent that either sliding surface may be treated in this way. Similarly, both surfaces may be treated if desired for some reason, although the desired result is accomplished simply by treating one surface.

The theory of operation of this treatment of the sliding surfaces which accomplishes the desired result so satisfactorily, cannot be stated with definiteness at this time. The following theory which matches the facts has been suggested.

Observation of the operation of the original smooth surface sliding members disclosed that bubbles of air formed at the longitudinal ends of the members I! and ii in the oil film between these two parts. These air bubbles in the oil film formed continuously, indicating that air was being pumped in at some other point. The'fresh oxygen and moisture in this air was the apparent cause of the corrosion.

Corrosion in many instances may be self limiting where the products of the corrosion remain on the surface on which they are formed. These products are inert to the original producing agent and therefore form a protective film. With this film removed a, fresh supply of oxygen would create new corrosion.

The oil film was not sufilcient to prevent corrosion because of the pumping action of the air which resulted in furnishing fresh moist air which was the oxygen supply. If this pumping action were removed it appeared that the corrosion would disappear.

The grooves in the sliding surface in accordance with this invention furnishing an air pathlustrated and described, it will be apparent that many modifications are possible without departing from the scope of the invention.

What is claimed is:

1. Apparatus for spinning and twisting textile yarns comprising a support for a spindle slidably mounted on a fixed lateral support, the bearing surface of one of said supports having a plurality of grooved depressions formed therein and continually open marginally beyond the slidably contacting surface portions in one direction.

2. Apparatus for spinning and twisting textile yarns comprising a support for a spindle slidably mounted on a fixed lateral support, the bearing surface of said fixed lateral support having formed therein a plurality of grooved depressions providing a corresponding plurality of continuously open air paths longitudinally from one end of said bearing surface to the other end thereof.

3. Apparatus for spinning and twisting textile yarns comprising a plate member for supporting a spindle, said plate member being slidably and resiliently mounted on a supporting member, the bearing surface of said supporting member, over which said plate member slides, having a cross hatched design of grooved depressions forming a labyrinth of continuously intercommunicating and continuously open air channels from one ertid of said bearing surface to the other end there- 0 JOHN K. COCHRAN.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date Re. 7,814 Cheetham Jul 24, 1877 534,477 Klots Feb. 19, 1895 725,053 Duffy Apr. 14, 1903 876,717 Johnson Jan. 14, 1908 2,321,664 Elvin et a1 June 15, 1943 2,343,533 Burnham Mar. 7, 1943 2,433,987 Gleitz et a1. Jan. 6 1948 

